save_state_file prints the full information of nodes

[IngoScholtes]

From pathpy created by giava90 : sg-dev/pathpy#54

It creates a file where after the #Vertices , it writes each node with all its properties, e.g.

*Vertices 5
0 "{'inweight': array([ 0.,  0.]), 'outweight': array([ 5.,  2.]), 'indegree': 0, 'outdegree': 1}"
1 "{'inweight': array([ 11.,   3.]), 'outweight': array([ 11.,   5.]), 'indegree': 2, 'outdegree': 2}"
2 "{'inweight': array([ 0.,  0.]), 'outweight': array([ 6.,  1.]), 'indegree': 0, 'outdegree': 1}"
3 "{'inweight': array([ 5.,  3.]), 'outweight': array([ 0.,  0.]), 'indegree': 1, 'outdegree': 0}"
4 "{'inweight': array([ 6.,  2.]), 'outweight': array([ 0.,  0.]), 'indegree': 1, 'outdegree': 0}"

Instead, we usually need only its name (at least when using this .net files for infomap), e.g.

0  "1"
1 "2"
2 "3"
3 "4"
4 "5"

[IngoScholtes]

fixed in #511c3da